This package provides a set a function to perform classical model checks on models fitted via greta. Note that this package is as of now intended to work for GLM(M) models.
After installing devtools in R run the following to install greta.checks:
library(devtools)
install_github("lionel68/greta.checks")
Please let me know in case of errors or if you have some feedbacks via: https://github.com/lionel68/greta.checks/issues